What Is Bioelectrical Impedance Analysis?

Bioelectrical impedance method (bioelectrical impedance analysis) is a technique for measuring human moisture by electrical methods.

Bioimpedance method

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Bioelectrical impedance method (bioelectrical impedance analysis) is a technique for measuring human moisture by electrical methods.

When a weak AC signal is introduced into the human body, the current will flow with the body fluid with low resistance and good conductivity. The amount of water determines the width of the path through which the current passes, which can be expressed by a measured value called impedance. However, the values of impedance and resistance differ only about 2 to 3 ohms in the human body. Since such a difference in resistance value can be ignored, the resistance value can be used instead of the impedance in the biological impedance method. The general principle of calculating human body composition by measuring impedance is calculated by using the principle that human moisture is proportional to height and inversely proportional to human impedance R. When a current flows through a conductor, the resistance of the conductor is proportional to the length of the conductor, The cross section is inversely proportional, that is, the volume of a conductor can be expressed as a function of the length of the conductor and the resistance. In the human body, the volume of the conductor can be regarded as the body moisture, and is used to analyze the body moisture.